Income Per Share Data - Components of Basic and Diluted Income Per Share Computation (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]
Net income from continuing operations available to common shareholders	$ 3,674	$ 3,178	$ 9,763	$ 10,846
Basic weighted average shares outstanding	13,585	14,413	13,639	14,563
Dilutive effect of outstanding stock options, non-vested restricted stock, restricted stock units and performance shares	228	326	252	260
Diluted weighted average shares outstanding	13,813	14,739	13,891	14,823